ANA has apparently rushed to clarify this, saying that it has not ruled out buying the aircraft. Frankly, it would surprise me if they didn't, given the demand for domestic air travel in Japan, not to mention competition from European competitors Virgin, AF and Lufthansa, all of which intend to fly the aircraft to Japan.
Remember, the 380 is a long term project, so what may ultimately turn out to be the largest customers may not be among the customers at the launch - look at CX and the 747. Plenty of time - and no doubt different variants to come as well.